feat: update CLI to use async connection to DB

[gabrielmbmb]

Description

This PR updates the CLI, so an async connection to the DB is used in the commands instead of a sync one. As the rest of the parts of the application are using the async connection, the code for the sync connection has been removed.

The list of changes of this PR are:

• Add AsyncTyper class which allows to register async command with its method async_command. It executes then executes the command using asyncio.run.
• Add run function that allows to execute an async command.
• Remove database_async_url property from Settings class. From now on, database_url should have an URL with an async driver (sqlite+aiosqlite:// or postgres+asyncpg://).
• Update Alembic connection to create an async engine to run the migrations.

Type of change

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested

• All the unit tests regarding the CLI are working as expected
• All the commands have been executed locally and working as expected (using both python -m argilla users create ... and python -m argilla.tasks.users.create ...)
• Migrations have been applied without errors in a local environment to both SQLite and PostgreSQL instances.

Checklist

• I added relevant documentation
• follows the style guidelines of this project
• I did a self-review of my code
• I made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I filled out the contributor form (see text above)
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[codecov]

Codecov Report

Patch coverage: 94.33% and project coverage change: +0.13% 🎉

Comparison is base (af60012) 90.39% compared to head (6abc09a) 90.52%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3450      +/-   ##
===========================================
+ Coverage    90.39%   90.52%   +0.13%     
===========================================
  Files          248      248              
  Lines        13232    13246      +14     
===========================================
+ Hits         11961    11991      +30     
+ Misses        1271     1255      -16     

Files Changed	Coverage Δ
src/argilla/tasks/training/__main__.py	31.57% <ø> (+1.57%)	⬆️
src/argilla/tasks/async_typer.py	80.76% <80.76%> (ø)
src/argilla/server/settings.py	83.00% <94.73%> (+5.58%)	⬆️
src/argilla/__main__.py	100.00% <100.00%> (ø)
src/argilla/server/apis/v1/handlers/responses.py	100.00% <100.00%> (ø)
src/argilla/server/database.py	83.33% <100.00%> (+8.33%)	⬆️
src/argilla/tasks/database/migrate.py	41.66% <100.00%> (+2.53%)	⬆️
src/argilla/tasks/database/revisions.py	30.00% <100.00%> (+3.68%)	⬆️
src/argilla/tasks/users/__main__.py	100.00% <100.00%> (ø)
src/argilla/tasks/users/create.py	90.00% <100.00%> (+9.56%)	⬆️
... and 4 more

... and 1 file with indirect coverage changes

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